A stranger in the check-out line has something hanging out of their nostril. They begin exchanging small talk with you. What do you do?

• Smile, act normal, and say nothing.
• Don't say anything, but rub your nose as you are talking to try and get them to do the same.
• Whisper the problem in their ear with a laugh to ease their embarrassment.
• Try to get the clerk or someone else nearby to mention something to them.

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